Thermal performance of undulant narrow channel with skewed sinusoidal wall-waves and 45° ribs
作者： Shyy Woei Chang , Bo-Jyun Huang
DOI: 10.1016/J.IJHEATMASSTRANSFER.2012.02.005
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摘要: This experimental study examines the properties of heat transfer, pressure drop and thermal performance factor (TPF) a narrow undulant channel enhanced by skew sinusoidal wall-waves 45° ribs. Detailed Nusselt number (Nu) distributions over wavy ribbed wall are generated steady-state infrared thermography method examined along with accompanying coefficient (f) in test Reynolds (Re) range 800–9000. With references to numbers (Nu∞) coefficients (f∞) smooth plain tube, area-averaged transfer enhancement (HTE) ratios, augmentations (f/f∞) TPF for tested compared those obtained from other passive HTE devices. Empirical correlations evaluating (Nu¯) assist design activities using this newly devised measure.
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